Well, that's tricky. Meg seems to be the "answer" to tion in a way, like "Tion'meg?" "Bac'meg."

But while it seems to stand on its own as way to determine specificity (that thing which fulfills this quality, that specific thing which is this), we also see it acting on its own in stuff like me'vaar ti gar.

Colloquially? I use meg or me' whenever I'm too lazy to say tion, which is often, though it doesn't work for more specific questions, like "Have you eaten today?"

So really, if I think meg will work, I won't use tion unless I think it's needed. personal opinion, tion is too clumsy to say when not needed.

Seem to recall you really only need cuy if you're using it as an affirmation of her existence - if in context of 'she is pretty' or 'she is brave' you'd say 'Kaysh mesh'la' or 'Kaysh kotep', rather than 'Kaysh cuy (predicate)'